uncompress VOB files

[zakman]

I have sucessfully been using Womble MVW to edit VOB files and save as MPEG files and then use DVDAuthorGUI to author. But MVW has problems with the latest VOB file I am working with (A/V sync problems). So I am thinking it might be a good idea to uncompress the VOB file so it is a pure "raw" file. How do I do this? I know this will take up a lot of disk space but I don't care (I have about 80 GB of free space).

I don't care if the results are a single AVI file or two stream files (one for video and one for audio). I see a lot of tools that claim they convert mpeg to AVI, but not sure if they can take a vob file. Also, not sure if the resulting AVI file is uncompressed.

[dun4cheap]

uncompress or demux the audio. I would think if your having audio sync problems now, it would only get worse to convert it to an AVI or something. Demuxing now, would be a different solution. I know Studio 9 now allows you to import and demux Vob files now. I am sure their are free tools like virtual dub that can possible to this. I would look for demux tools, besweet may be another.

[zakman]

Thanks dun4cheap, but I have already tried demuxing and that had the same problem. It appears that the mpeg info in the vob file is confusing womble so when it outputs the file, it makes a mistake. So I was thinking if I could use another program to uncompress the video/audio before loading into Womble, then I wouldn't have this problem. So the question remains:

How can I uncompress a VOB file?

[sanjayk]

Try VOBEdit or MPEG options in TMPGEnc to demux your VOB file.

[zakman]

Try VOBEdit or MPEG options in TMPGEnc to demux your VOB file.

I don't want to demux it. I want to uncompress it!
Let's say I demux it first into audio and video streams. How can I uncompress the video stream (i.e., mpeg compressed) into an uncompressed AVI (or some other container) file?

[Abond]

It sounds easy. Load the m2v in VDubMod, set the video in Full Processing - save as - avi - it will save uncompressed avi video file. BTW it can get also vob, but only with one audio stream.

[sanjayk]

Ok I missed out on your last line. Well VirtualDubMod is the way to go, as already suggested by Abond, if you really want to uncompress your VOB to AVI. But that will not increase the quality IMO if that is what you are getting at. Maybe I am missing something.

[zakman]

Thanks. I will try VirtualDubMod. And no, I am not trying to increase quality. I am trying to find a way to get around problems with programs (like Womble MVW) which sometimes drop a few mpeg frames when exporting (I don't understand why).

[maetel99]

Most of the freeware video decoders out there cannot handle DVDs with variable frame rate video. This is unfortunately getting more and more common, especially in music videos and discs produced by newer DVD recorders.

Many NTSC DVDs with film source material will also screw up the 2-3 pulldown cadence in places, giving hiccups and sync problems with nearly all the freeware and shareware MPEG decoders.

If you want something that can correctly handle DVDs like this and keep things in sync, you'll have to go with commercial software. Take a look at Cinematize.

[Abond]

...DVDs with variable frame rate video.

Interesting, never heard about DVDs with variable frame rate video (maybe you mean variable bitrate?)
FYI almost three years I am using freeware for video exclusively and have had no single problem.

[zakman]

If you want something that can correctly handle DVDs like this and keep things in sync, you'll have to go with commercial software. Take a look at Cinematize.

Unfortunately, the demo is too limited for me to determine if it will do the job. The demo only allows you to test a very small video.